Lots of good questions and lots solutions to research.
I run LVS for HA and failover on RHEL 4 and the same setup should very
easily work on RHEL 5. I've added the ipvsadm package (find it in
Fedora or CentOS) and am using a userland daemon called Keelalived.
http://www.keepalived.org/
For me, this has been a better solution than what's included with
Advanced Platform. Keepalived uses 3 threads for all of its
functionality. (IIRC, the AP stuff uses one process for each service it
needs to run a health checker against.)
The big benefit to me is the use of the VRRP routing protocol to handle
failover. With this I can have N servers doing load balancing and each
server is responsible for a specific set of virtual services. If one of
the load balancers goes down there are predefined rules or an election
as to which load balancer picks up with virtual services.
Good luck with your research.
Jack
--
Jack Neely <[EMAIL PROTECTED]>
NCSU Campus Linux Services Lead
Office of Information Technology, NC State University
GPG Fingerprint: 1917 5AC1 E828 9337 7AA4 EA6B 213B 765F 3B6A 5B89
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